In a talk at GDC, Cryptic Studios' Jack Emmert discusses the difficulty of adding new systems into your MMOG if you don't plan for them.

Does an MMO need 400 hours of gameplay? "Frankly, we were naive and enthusiastic, and we said, 'sure.' So we calculated everything on the assumption... that you'd have to make 400 hours worth of missions," began Cryptic Studios Jack Emmert, as he explained how City of Heroes was developed to order for NCsoft.

Nor were any microtransactions planned. But the aim was to deliver original content once every three months -- it ended up not being quite so often. On its release, the game had its strengths and weaknesses like any other. As far as the former, there were character customization options and moment-to-moment gameplay. As to the latter, there was missing PvP and an absence of new loot, on which typical MMO players thrive.